[jboss-jira] [JBoss JIRA] Created: (JGRP-417) ConnectionTable.run / ClassCastException with IBM Java 1.5

[Yves Martin (JIRA)]

ConnectionTable.run / ClassCastException with IBM Java 1.5
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                 Key: JGRP-417
                 URL: http://jira.jboss.com/jira/browse/JGRP-417
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.2.9 SP4
         Environment: $ java -version
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build pxi32devifx-20061107 (iFix 111765: SR3 + 111700) )
IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux x86-32 j9vmxi3223-20061001 (JIT enabled)
J9VM - 20060915_08260_lHdSMR
JIT  - 20060908_1811_r8
GC   - 20060906_AA)
JCL  - 20061107

            Reporter: Yves Martin
         Assigned To: Bela Ban
            Priority: Critical


When migrating a project to IBM Java 1.5,
I get the following warning from ConnectionTable:
ConnectionTable.run(): exception is java.lang.ClassCastException: IpAddress.compareTo(): comparison between different classes
And communication times out.

The same code works perfectly well with Sun Java 1.5.0_07

The drop stack trace show it comes from Hashtable.contains.
After comparison between Sun src.zip and IBM src.jar for Hashtable,
. Sun does entry.equals(value)
. IBM does value.equals(entry)

As a result, JGroups happens to do a IpAddress.equals(Connection) with IBM JVM
and fails. Whereas Connection.equals(IpAddress) is properly handled in case of Sun JVM.

Patch is trivial but the bug analysis was difficult !!
Here is a valid IpAddress.equals method.
    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IpAddress)) return false;
        return compareTo(obj) == 0 ? true : false;
    }

Thank you in advance to include this patch in JGroups 2.2.9 so that JBoss 4.0.x may work one day with IBM Java 1.5


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